
<template>
  <HomePanel
    title="热门品牌"
    sub-title="国际经典 品质保证"
  >
    <template v-slot:right>
      <a
        @click="toggle(-1)"
        :class="{disabled:index===0}"
        href="javascript:;"
        class="iconfont icon-angle-left prev"
      ></a>
      <a
        @click="toggle(1)"
        :class="{disabled:index===1}"
        href="javascript:;"
        class="iconfont icon-angle-right next"
      ></a>
    </template>
    <div
      class="box"
      ref="box"
    >
      <ul
        class="list"
        :style="{transform:`translateX(${-index*1240}px)`}"
      >
        <li
          v-for="item in result"
          :key="item.id"
        >
          <RouterLink to="/">
            <img
              :src="item.picture"
              alt=""
            >
          </RouterLink>
        </li>
      </ul>
    </div>
  </HomePanel>
</template>

<script>
import HomePanel from './home-panel'
import { getBrandListAPI } from '@/api/home'
import { useLazyData } from '@/hook'
import { ref } from 'vue'

export default {
  name: 'HomeBrand',
  components: { HomePanel },
  setup () {
    // 点击切换页
    const index = ref(0)
    const toggle = (step) => {
      const newIndex = index.value + step
      if (newIndex < 0 || newIndex > 1) return false
      index.value = newIndex
    }
    // 数据懒加载
    const { target, result } = useLazyData(getBrandListAPI)
    return { box: target, result, toggle, index }
  }
}
</script>

<style scoped lang='less'>
.home-panel {
  background: #f5f5f5;
}
.iconfont {
  width: 20px;
  height: 20px;
  background: #ccc;
  color: #fff;
  display: inline-block;
  text-align: center;
  margin-left: 5px;
  background: @xtxColor;
  &::before {
    font-size: 12px;
    position: relative;
    top: -2px;
  }
  &.disabled {
    background: #ccc;
    cursor: not-allowed;
  }
}
.box {
  display: flex;
  width: 100%;
  height: 345px;
  overflow: hidden;
  padding-bottom: 40px;
  .list {
    width: 200%;
    display: flex;
    transition: all 1s;
    li {
      margin-right: 10px;
      width: 240px;
      &:nth-child(5n) {
        margin-right: 0;
      }
      img {
        width: 240px;
        height: 305px;
      }
    }
  }
}
</style>
